Pump-plunger.



No. 665,506. Patented 1an. s, |901. J. A. cARLsoN.

PUMPPLUNGER.

(Application led May 6, .1899.) (No lloel.)

9% Q. @M FER W TN: gums PETERS co. Przaoumo., WASHINGTON n n UnitiesSTATES kJOHN A. CARLSON, OF STROMSBURG, NEBRASKA.

PUMP-PLUNGER.

SPECIFICATION forming part of Letters Patent No. 665,506, dated J'anual-y 8, 190i Application filed May 6, 1899.

T all whom, it may con/cern:

Be it known that l, JOHN A. CARLSON, residing at Stromsburg, in thecounty of Polk and State of Nebraska, have invented certainusefullmprovementsinPump-Plungers; and I do hereby declare that thefollowingr is a full, clear, and exact description thereof, such as willenable others skilled in the art to which it appertains to make and usethe same, refro erence being had to the accompanying drawings, whichform a part of this specication.

This invention has relation to an improvement in pump-plungers andpiston-heads.

The object of my invention is to provide a plunger or piston-headadapted to form an exceedingly tight union within the casing inconnection with which it is Operated.

ln the accompanying drawings I have shown in Figure l a perspective viewof a zo plunger or piston-head embodying my invention. Fig. 2 shows acentral sectional view thereof.

Referring to the drawings, E represents a suitable rod, the end 2 ofwhich is threaded and is provided with a nut 3 and washer 4. Workingbetween the shoulder 5 and the Washer 4, which shoulder is formed inmaking the end G of a reduced diameter, are the two end sections of mypump-plunger and piston-head,

3o one section being marked A and the other B,

as is shown in Fig. 2. The section A is provided with the flange or diskextension A and an inner upwardly-extending hub 7, from which hubextends a sleeve 8, as is shown.

This lower section A is provided with the escape-openings a, which runlengthwise of the rod E, while transversely of the sleeve S are theopenings b. Telescoping upon the lower section A is the upper or secondsection B,

4o which section is provided with the inwardlyextending hub 9 and theextending sleeve 10, which sleeve surrounds the hub 7 and sleeve 8 ofthe section A, while the section B is further provided with the fiat ordisk extension 45 B'. The section B is further provided with theopenings d and b', and the extension 9 is made to 'register near theinner edge of the sleeve S, so that an annular chamber C is provided,into which chamber extend the ducts 5o b and b'. The section B is at oneor more suitable points' provided with the pin x, entering a suitableopening within the sleeve 8 Serial No. 715,863. (No modela of thesection A, so that these two telescope sections are securely united.Working between the flanges A and B is the ring F, provided with theannular grooves l2 and 13, within which grooves work the packing-ringsc, of the usual spring-ring type. This ring F is preferablyin threesections, so that one section tees into the other. Working between thesectional ring F and the section B is a split ring L, which looselyWorks between these two members, this ring L being connected to thevarious ring-sections F by means of a pin y, as is shown. Working withinthe annular chamber within the sections A and B and surrounding the stemportion 6 is a valve K, which works freely up and down within thischamber and is of any suitable material and is adapted to alternatelyclose the openings a and a'.

As usually constructed the piston must run at all times tight enough toinsure against leakage under the highest pressure. With my improvementthe pressure is directly apportionate to the pressure in the cylinder,and when this begins to fall at the end of the stroke the pressure ofthe packing also begins to fall, which. increases the life of the pistonas well as that of the cylinder. This is accomplished as follows: Inoperation the steam or water would enter, we will assume, the loweropening 0., the valve K would at once be thrown upward to close theopenings a', so that the water or steam pressure would expand the ring Lin passing through the ducts b and b', and this ring in turn would carrythe sectional ring F outward, and this sectional ring F in turn wouldcarry with it and expand the packing-rings c c, which are of somesuitable material, so that from this it Will be seen that if a verygreat pressure is within the chamber C an exceedingly snug union betweenthe housing and the packingring c is insured, while it the pressure isnot very great a less-tight union is required, and consequently thesteam exerts a lower degree of pressure upon the ring 1l and membersoperated thereby. In the return stroke of course the opposite holes areclosed by the valve, so that the packing-rings c c are again expanded toinsure an absolutely snug union; and, I

Having thus described my said invention,

IOO

what I claim as new, and desire to secure by United States LettersPatent, is-

In a pump-plunger of the Character deseribed, a suitable rod providedwith an upper and a lower end section, the lower section bein;r providedwith an inwardly-extending hollow hub, there being escape openingswithin this lower section, While openings are positioned transverselywithin said hollow hub, said upper section telescoping over said hollowhub and being provided with registering,r transverse openings, saidupper section also being provided with a hollow hub hav ing transverseand vertical openings therein,

said two telescoping upper and lower sections being suitably united,packing-rings workingr between said two end sections, a split ringworking between said packing-ring and said hollow hubs, and aplunger-valve working within said hollow hubs which form a chamber toalternately close the Vertical openings within said end sections.

Signed in the presence of two witnesses.

JOHN A. CARLSON.

Witnesses:

MILTON A. MAKEEVER, JOHN E. PETERSON.

